I am having some trouble installing Presta on my 1&1. The tutorial says to go to my domain /install to do so but every time I set out to do this it says that there is a 404 Error and the page cannot be found. What am I doing wrong. I have used FileZilla to upload the files to my host (which is 1and1). Also, when I go to my website directly it goes straight to my host provider. However, when I go to my domain/backoffice it works.